Bond behaviour improvement between infra-lightweight and high strength concretes using FRP grid reinforcements and development of bond strength prediction models

Liu, Yue; Tafsirojjaman, T.; Dogar, Attiq Ur Rahman; Hückler, Alex

doi:10.1016/j.conbuildmat.2020.121426

Cited by 28 publications

(12 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, FRP bars have additional advantages, including high tensile strength, light weight and excellent fatigue resistance (Kazemi et al, 2020), and therefore have been used in concrete structures, such as those in bridge engineering (Zafari et al, 2016;Siwowski et al, 2018;Kim, 2019;Zou et al, 2021), geotechnical engineering (Merwe and Hofmann, 2020) and traffic engineering (AI-Saoudi et al, 2021). However, compared with normal reinforced concrete structures, FRP reinforced concrete structures are characterized by higher deflection and larger crack widths due to their lower modulus and linear elasticity before fracture (no yield state) (Gar et al, 2018;Issa and Ismail, 2020;Liu et al, 2021); these factors hinders further promotion and application of FRP materials in the field of civil engineering (Barris et al, 2017;Ge et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of GFRP Reinforced Concrete Beams With U-Shaped CFRP Grid-Reinforced ECC Stay-in-Place Formwork

Zhang

et al. 2022

Front. Mater.

View full text Add to dashboard Cite

Corrosion is a major concern for structures under the harsh environment. In this paper, ECC was applied as an alternative to concrete in tension zones, which was combine with FRP bars to develop a new type of composite beam with excellent durability. The flexural performance of glass fiber-reinforced polymer (GFRP)-reinforced concrete beams with U-shaped CFRP grid-reinforced ECC formwork was investigated. Five beams were designed, including one reference beam with full concrete, one composite beam with a coupon-shaped ECC permanent formwork at the bottom, and three composite beams with the proposed formwork. The effects of the application of the U-shaped ECC formwork, the formwork types, the application of CFRP grids, and the strength of the ECC were investigated. The test results showed that ECCs were an ideal material to improve the flexural behavior of FRP-reinforced concrete beams. The proposed formwork had a positive effect on crack resistance at the serviceability limit and substantially improved the cracking load by 78.57–85.71% and the ultimate load by 5.29–15.71% compared with those of the reference beam. Moreover, the proposed formwork improved the shear stiffness of the composite beam. The addition of CFRP grids improved the tensile strength of the ECC formwork and consequently contributed to the improvement in the load capacity of the composite beams.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental Study of GFRP Reinforced Concrete Beams With U-Shaped CFRP Grid-Reinforced ECC Stay-in-Place Formwork

Zhang

et al. 2022

Front. Mater.

View full text Add to dashboard Cite

show abstract

“…Fiber-Reinforced Polymer (FRP) is made of high-performance fiber and resin matrix through a special production process. It has excellent properties of lightweight [ 2 , 3 ], high strength [ 4 , 5 ], corrosion resistance [ 6 , 7 , 8 ], and fatigue resistance [ 9 , 10 ]. In recent years, FRP has gradually attracted more popularity in the field of civil engineering [ 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on Bonded Anchorage of Carbon Fiber Reinforced Polymer Prestressed Strands

Jia¹,

Wang

Tafsirojjaman

2022

Polymers

Self Cite

View full text Add to dashboard Cite

Aiming at the problems of a large number of corrosion and fatigue damage of the current prestressed steel strands, this paper adopts carbon fiber-reinforced composite (CFRP) strand with better corrosion resistance and fatigue resistance and uses it in concrete structures. The bond anchorage is usually used to anchor CFRP tension members, which bonds the CFRP through the binding medium. Through experimental research on the CFRP strand bond anchorage, the inner taper of the CFRP prestressed strand cone was anchored and the influence of different anchor lengths and bonding media on the anchorage performance was determined. The test results demonstrate that the taper of the conical anchorage described in this paper is a key factor affecting its anchorage performance and increasing the inner taper within a certain range is beneficial to improving the anchorage performance of the conical anchorage. The bonded anchorage of the CFRP prestressed strand with a 200 mm anchor is the most reliable and efficient, as the taper of the 200 mm anchor is the largest. The average anchoring efficiency coefficient of the 200 mm anchor was 96.4%, which is 3.7% and 2.6% higher than the average anchoring efficiency coefficient of 220 mm and 250 mm anchors, respectively. The anchoring efficiency of the anchor is also high (94.1%) when the epoxy resin mortar is used as the bonding medium. Moreover, after an appropriate amount of quartz sand is added to the epoxy resin, the overall comprehensive performance of the anchor can be improved to a certain extent and the stress of the CFRP strand can be improved. The coupling between ultra-high-performance concrete dry mix (UHPC-GJL) and CFRP strand materials is not suitable for UHPC-GJL being used, as its binding medium as the average anchoring efficiency coefficient is only 44.5% when UHPC-GJL is used as the anchor bonding medium.

show abstract

“…Therefore, utilization of fibre-reinforced polymer (FRP) in civil and structural engineering applications has become very common around the world, due to its most remarkable advantages, including high resistance to corrosion, substantial improvement in the strength and stiffness of an established structural element with minimal impact on the environment, and high strength to weight ratio [22][23][24][25][26][27][28]. Therefore, a researcher claimed that when FRPs (carbon, glass, aramid, and basalt fibre) are utilized as concrete strengthening materials, sea sand can be utilized without even salt removal [3].…”

Section: Introductionmentioning

confidence: 99%

Cracking behavior of sea sand RC beam bonded externally with CFRP plate

et al. 2021

Self Cite

View full text Add to dashboard Cite

CFRP is an alternative technique for cracking control of high-chloride reinforced concrete (RC) beams. This research, therefore, investigates the strength performance and failure mode and cracking behaviour of RC beams incorporated with sea sand bonded externally with the carbon fibre reinforced polymer (CFRP) plate. Sea sand is used as a 100% replacement of fine aggregate. Three batches of RC beams were carried out in this research, including the control beam (no sea sand neither CFRP), RC beam with normal sand bonded with CFRP plate, and RC beam with sea sand and bonded with CFRP. A four-point bending test was performed under static loading for the specimens. Finite element simulation was modelled for further comparison. The experimental findings showed that the flexural capacity of the sea sand RC beam bonded externally with CFRP plate is 5.50% greater than the flexural strength of the beam without CFRP (control beam). Besides, results demonstrated that RC beams bonded externally with CFRP were failed by plate end debonding (PED) while the control RC beam without bonding was failed at the mid-span by concrete crushing. However, the bonded RC beams were stiffer, which could lead to lower crack spacing. Finite element simulation showed very acceptable results compared to the experimental results.

show abstract

Bond behaviour improvement between infra-lightweight and high strength concretes using FRP grid reinforcements and development of bond strength prediction models

Cited by 28 publications

References 33 publications

Experimental Study of GFRP Reinforced Concrete Beams With U-Shaped CFRP Grid-Reinforced ECC Stay-in-Place Formwork

Experimental Study of GFRP Reinforced Concrete Beams With U-Shaped CFRP Grid-Reinforced ECC Stay-in-Place Formwork

Experimental Research on Bonded Anchorage of Carbon Fiber Reinforced Polymer Prestressed Strands

Cracking behavior of sea sand RC beam bonded externally with CFRP plate

Contact Info

Product

Resources

About